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Wo bekomme ich ein Fabscan HAT und Step Down

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leonnoel
Posts: 31
(@leonnoel)
Eminent Member
Joined: 1 year ago

The Scan Board Laser V1.0 does not appear to have a LDR connector cluster, only the LSCD connector same as the Arduino UNO R3.

To have something interesting to do I have used the Thingiverse Ciclop things to make a unit

Arduino UNO R3 loads the firmware and the LDR port(connector cluster) of the ZUM Hat can be used to drive the WS2812 led if connected to the data terminal labeled S1 (connects to Meg328 chip pin 24 of the Arduino - I think), +5v to V1 and ground to G1.

I am attaching pictures of the installation using - a PI4 4G kit, a LM2596 DC supply step down module, an Arduino UNO R3, and  bare ZUM Hat to which the stepper drive, the 2 laser switching JFET transistors and associated components were added.  

When booted up the unit takes a few seconds to flash the light and when accessed with a browser the shows that Laser 0 is on. I can opera-ate the Light, the Lasers and the motor at that time.  

The calibrate function is not correct and to calibrate with what appears to be correct I must shutdown, remove power from the unit, reboot and then use the browser to turn off Laser 0 and request a calibration which appears to complete ok.

To scan with the appearance of everything working again the shutdown sequence must be completed.  I placed a black velvet curtain behind the table for the calibration and scan operation.

I am attaching screenshots of some intermediate operations and scans with either interface as True and then as False.

No condition gives a satisfactory scan so at this point I need help, too. 

I am thinking of making another Arduino-Zum unit to use with FabscanPi and change the configuration file to reflect the serial port and baud rate to what is needed for the for the Arduino in place of the FabscanPi-Hat.  I suspect that the Zum Hat was likely and first it influenced the design of

the FabscanPi Hat.

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leonnoel
Posts: 31
(@leonnoel)
Eminent Member
Joined: 1 year ago

I spent yesterday trying to get a decent scan and got what I thought was an acceptable scan of the test cube but requiring a lot of editing.  I loaded a new sd card and tried to duplicate the efforts. WOW  I have to brag, the cube was just perfect so had to do another item at the 2 lowest resolutions.  I setup the the camera and lasers using a calibration cone from Thingiverse-Sardauscan and a cube 50mm across the base diagonal and 75mm high.  Conditions for scanner- default with the weather raining and clouds overcast, south facing window blinds closed, tv off and overhead light off, black curtain behind the ciclop table.  Here is a zipped file of the scans, the default.config.json file, the log and /scan folder.  The scan .ply files are also included. Please note that the last scan is not included in the Fabscanpi scan save location and i don't know what triggers the saving of the scan.  I've noticed that this has happened before with the Fabscanpi.

A youtube video shows the calibration checkerboard at the the edge of the table to calibrate.  I used a location the same distance ahead of the table center as the FabscanPi.

I have not used the reloaded software enough today to determine if difficulties of past days occurred other than the Laser0 tends to default to on rather than off.

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